science

Tolazoline

Tolazoline is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Tolazoline rather than just read about it. In short: Tolazoline is a non-selective competitive α2-adrenergic receptor antagonist. It is a vasodilator that is used to treat spasms of peripheral blood vessels (as in acrocyanosis).

Key takeaways

Tolazoline belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Tolazoline to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Tolazoline from memory before moving on to harder problems.

Reference excerpt

Tolazoline is a non-selective competitive α2-adrenergic receptor antagonist. It is a vasodilator that is used to treat spasms of peripheral blood vessels (as in acrocyanosis). It has also been used (in conjunction with sodium nitroprusside) successfully as an antidote to reverse the severe peripheral vasoconstriction which can occur as a result of overdose with certain 5-HT2A receptor agonist drugs such as 25I-NBOMe, DOB, and Bromodragonfly.

History Tolazoline was first used in the 1980s as an alternative reversal agent for xylazine.

Use Tolazoline is used in large animal medicine to reverse the effects of α2-adrenergic receptor agonists, typically xylazine. Large doses of intravenous tolazoline in cattle can cause hyperesthesia and opisthotonos and other routes such as intramusucular are preferred.

Pharmacology Tolazoline binds to the a2 adrenergic receptor at a ratio of 4:1, the lowest of all a2 adrenergic receptor antagonists. Tolazoline activates the imidazoline receptor. IV tolazoline has slow elimination and a large distribution in the horse.

References

Illustrations

Worked examples

Example 1 — a first encounter with Tolazoline

Start with the simplest possible case. Write down what Tolazoline claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Tolazoline before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Tolazoline ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Tolazoline

In research: Tolazoline appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Tolazoline in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Tolazoline is common in secondary-school and first-year university syllabi. It links to neighbouring topics Alpha-1 blockers, Alpha-2 blockers, Disulfiram-like drugs, so understanding it makes those chapters shorter.
In everyday life: Look for Tolazoline outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Tolazoline in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Tolazoline means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Tolazoline out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tolazoline in simple terms?

Tolazoline is a non-selective competitive α2-adrenergic receptor antagonist. It is a vasodilator that is used to treat spasms of peripheral blood vessels (as in acrocyanosis).

Why does Tolazoline matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Tolazoline?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Tolazoline.